I’ve been trying several builds of Windows 7 x64 on my Macbook that uses the Intel 945 Express Chipset. Recently, I did a clean install of Windows 7 build 7100. The display driver that is installed is a Prerelease WDDM 1.0 Driver (126.96.36.1990).
When I tried to play a DVD with Windows Media Player, I received the message “Cannot play DVD video.” Microsoft gives several possible reasons for this message:
- Your video card driver is out-of-date.
- Your computer is missing a compatible DVD decoder.
- Your computer hardware is not powerful enough to play DVDs.
Since build 7 is Windows 7 Ultimate, I assumed a decoder was built in to the OS. I was indignant that suggestion 3 was questioning the manhood of my Macintrash.
Then I remembered the OpenGL problem I had with one of my programs. After I installed the Intel Vista 64 bit drivers 188.8.131.524 for the 945GM Chipset from downloadcenter.intel.com, WMP was able to play DVDs. I’m not sure why the Prerelease WDDM 1.0 Driver didn’t allow the decoding, but the released Vista driver works – just be sure to run the installer in the compatibility mode for Windows Vista.
My Windows Experience Index also went up a tad compared to build 7068; compared to build 7000, the WEI from 2.0 to 3.0. So my computer is getting faster as it ages or Microsoft is improving Windows 7.